Distance Reiki works because in the big wide cosmos there is no separation of time & space

If we are talking quantum physics, we could be living simultaneously in different dimensions, so Reiki energy travelling around the globe is an easy one!

You can lie down and receive Reiki directly as it is sent to you

You can request it to be sent to your higher self
and later you can rest & bring the energy down to you

Or, you can go about your normal business & let the Reiki flow around you & integrate as you go